We may occasionally see blue smoke from some car exhaust pipes on the road, and the blue smoke from the exhaust pipe is mostly because of the engine oil burning, but for some cars, Xiaobai does n’t know what is burning oil. So, what does it mean that the engine burns oil? What are the reasons for burning oil? Let's take a look at it together.
What does engine burning oil mean
Once blue smoke comes out from the exhaust pipe of a car, it means that the car has burned oil. Burning oil "means that the oil has entered the combustion chamber of the engine and participated in the combustion with gasoline. As a result, excessive oil consumption will cause the engine Increasing carbon deposits in the combustion chamber, there will also be adverse consequences such as unstable idle speed, weak acceleration, increased fuel consumption, and excessive exhaust emissions. In severe cases, it will cause insufficient engine lubrication, increase wear and tear, cause damage, and significantly increase maintenance costs. Hidden accident.
What are the reasons for burning oil?
If the oil is not changed at the oil change interval, improper maintenance of the oil filter will make the oil dirty, causing the oil to block the piston and the oil gap at the piston ring, resulting in increased fuel consumption as described in cause # 17. Dirty oil also causes increased wear on bearings, cylinders, pistons, and piston rings. These worn parts, as explained in the corresponding sections above, can lead to increased fuel consumption. Special note: Dirty oil itself consumes more than clean oil.
2.Too much oil in the oil pan
Because the oil dipstick was inserted incorrectly and failed to seat to the end, the measured oil level was lower than the actual oil level, so new oil was added to make the oil level too high. If the bottom end of the high-pressure lubricated engine touches the oil surface, or the oil ring of the splash-lubricated engine is dipped into the oil pool too deeply, it will cause excessive oil to fling to the cylinder wall and enter the combustion chamber.
3.The supplied piston ring is not suitable for the type of engine or work type
If an incorrectly sized piston ring is selected (for example, a 0.020 "enlarged piston ring is used in a 0.040" enlarged cylinder), due to the improper cooperation of the two, the oil on the upper part of the cylinder cannot be scraped back, which will immediately cause Oil channeling phenomenon. Similarly, the gap between the bottom of the piston ring and the ring groove is also increased, further increasing the oil consumption for the reason described in # 26. Different types of engines and different working conditions require a variety of specially designed and manufactured piston ring sets. Each type of piston ring set is made for a specific purpose. If used in the wrong place, it will not be possible to control the engine's oil consumption. It is important to use the correct set of piston rings.
4, timing gear or chain wear
Wear of timing gears or chains can cause the timing of the valve and crankshaft to become out of sync. Due to excessive backlash caused by tooth or chain wear, the engine cannot be adjusted: the timing of the previous lap and the next lap may not be the same. When the movement of the valve and piston is not synchronized, it will cause excessive oil consumption. The reason is that excessive vacuum in the combustion chamber will draw a lot of oil into it and burn it.
5. Gas valve timing lag
The lagging valve timing makes the intake valve closing time too long after the start of the intake stroke, increasing the vacuum in the cylinder, increasing the chance that the oil will be sucked into the upper combustion chamber of the cylinder from the piston and the ring, and the gap between the cylinder liner will burn out.
6.The oil pressure is too high
Incorrect oil pressure setting and failure of the safety relief valve will cause excessive oil pressure. The result is that the engine is wet with excessive oil, producing the same results as bearing wear.
7, oil viscosity
The viscosity of the oil used is too thin, which may cause high oil consumption. Please refer to the vehicle maintenance manual to select an appropriate oil viscosity based on driving conditions and ambient temperature.
The above is what is meant by engine oil burning, what are the reasons for burning oil, and I hope to help you!